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Hello Subscriber
Regular on-site meter testing is essential to bring the losses down. The first thing which you will always do, is to check the wiring to the meter. With help of the vectorial display you are able to figure out eventually faults. Most test equipment manufacturers offer this feature. The above image was taken in the field and provided to me thanks to my friends in East Africa.
On first sight you can see that there is only one current and two voltages for a three-phase four wire meter. If you discover situations like this, there is no need to do an error measurement, since the portable test equipment takes the same values as the meter. So the error would be somehow within the range. The installation must be in order first.
In the above case the underground mains cable was particularly damaged.
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Modern reference standards and calibration devices have usually a graphical function to show the relationship between the voltages and the currents. Most equipment manufacturers call this function vector diagram or vectorial diagram.In fact it is a phasor diagram. It represents a the phase relations of a sinusoidal rotating system at a certain time.The system rotation (everything inside the circle) is anti-clockwise. …
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Thank you for your interest, have a happy day and stay safe,
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Reinhard Günther
and the CLOUGLOBAL Team
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We will be on Spring Festival Holiday from February 6 to February 17.
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